Lock



I pfFig. 3 but showing the-boltretracted;

20 the locking elements; A

'1 3o thefcover plate'removed showing Patented Oct. 7, 1930 -DSTATESI "PATENT orrlcs WILHELM wonnrg on READING rENNsYLvANIA, "ASSIGNORQ T PENN HARDWARE r COMPANY, INC., on nn nINe, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA Ap lication filed August a, 1928; Serial No 298512.

w-. This invention relates to improvements in locks, and more particularly to, that, class of locks known as jimmy-proof. i

. Y K i The principal obj ectiof my invention is to i I v '5 provide a jimmy proof lock adapted for use on swinging doors which shall have cer- 'tain desirable structural'an'd design and opcrating features'which makeit particularly.

effective forthepurpose for: which it is intendech as hereinafter set forth in detail. A 1.111 the attachedfdrawingsz" V Figure 1 isa front view of a mortise lock made in accordance with my inventionrwith v the'boltextended; f p z T-Fig'. Qisa side viewof the lock; *1 a Fig; :3- is a sectionon the line 33, '1 'Fig. 4 is a sectional view similar to that 1 Fig. 5' is a view in perspective of 'one of Fig. 6 isa view in perspective of the spring controlling the 1 locking elements;

Fig.7 is a frear'view of the strike forming a part of the lock as a whole; i i Fig. 8 is a' sectional diagrammatic view showing the lockas applied to'a door} V 1 Fig. 9 is asection'onthe line 99, Fig. 2, andv 1 :Fig. 10 is a face view of the lock'w'ith details of the operating-mechanism. 7

,With reference to the drawings, the lock *may comprise the usual casingl which in -the'present instance is of the form adapted to be set into a mortise inthedoor, the easing having secured at one edge a front plate 1-2 which'li'es flush with the outer edge of the c door in well knownmanner'. This plate 2 is apertured for the passage of a dead-bolt 3 anda latch-bolt 4, the bolt 4 normally ock cupying. an extended position, and both of thesefelements are 'actuablefby mechanism within the casing 1 through the'medium of a key inserted in a cylinder lock'5detachably secured inthe casing, as illustratedand in a manner, w'ell'understood in the art. "The latch-bolt 1 is also 'retractible by'means' of a handle having a shaft'extending into a socket 6 in the casing.- The lock in so far as described above is in' general of well known type the general-operation of which will be it readily understood.

Referring now to Figures 2 to 4, inclusive, of the drawi'ngs,fit willbe noted that the dead-bolt 3, instead of being of the standard solid form, is composed of two side members 7 and 8 spaced apart and joined at their outer ends by means of a bridge 9. \Vithin the space between the; sidebars? and 8 are-pivotally mounted a pair of hookedelementsll A and'12'which, when the bolt is retracted, as

shown in Fig. 4, lie-in their outer portions ent rely within the planes defined by the sides ofthe bolt so that no part thereof projects a v beyond thefaces of the sidebars 7 and 8.

TAs shown inFigs. 3 and 4,,the hooked elements 11 and 12 are pivotally mounted ona transverse pin 13' extending between the side bars 7 and 8 of the bolt and are provided {at their inneren'ds with lugs 14 and 15 which, when the bolt is retracted as shown in Fig. 4, are free to project beyond the planes of the sidefac'es of thebars 7 and 8. When the bolt is advanced, as shown in Fig. 3, these projecting lugsl l and 15 come into contact with fixed abutments or shoulders 16, 16 in v the casing 1 which are positioned in the path of theprojecting ends of the lugs 14s and 15, with the result that as thebolt is forced outwardly, the lugs 14 and 15 are forced inwardly and toward each other, as shown in Fig. 3,

with the result that the outer hooked ends of the members 11 and 12 are projectedbeyond theplanes of the side faces of the bars 7 and 8, and are held in this'position by contact between the lugs 14 and 15 and the sides of thecasingr 'As the'bolt is withdrawn into the casing and the lugs Hand 15 clear-the shoulders- 16, the members 11 and 12are per mitted to returnto their normal retracted positions, which is accomplished promptly in the present instance by means of a spring 17 onthepin'13'seated in recesses 18 in the abutting fa'ces o'flthe'sa'id members withthe extremities'thereof secured in grooves 19 extending from the-recesses. Not only does the spring function to immediately retract the members 11 and 12 when the lugs 14 and 15,

on the inward movement of the bolt, clear the shoulders 16; butiit insures retention of the members ll and 12in the retracted positions in the advance movementiof the bolt "until the said lugs actually engage the shoulders. This insures a proper operation of the bolt un-derall conditions. V

I In conjunction with the aforedeseribed look, a strike plate maybe employed, as. shown in Figs. 3, 7, 8 and 9, this strike plate 21;

being adapted to be secured in well known manner to thedoor frame andihav ng an opening 22 for reception of the latch-bolt and a second opening 23 for reception of the dead-bolt. It will be apparent that when the bolt 3 is projected through this opening 23 in the strike plate and into the recess in the door frame provided for its reception, the

extended hook members 11 and 12 positively preclude retraction of the bolt through the opening 23 except in normal manner by means of key or handle. Otherwise, thehook members 11 and 12. being held positively in V the-projected"position prevent such drawal,

with a bufler 125 adapted to engage the strike 24- inadvanceof the-bolt head and to largely eliminate friotionbetween the strike and the 7 bolt parts."

1 The buffer 25 and itsmountin'g-is shown in Fig. 9. The buffer has an extension 2 6; the

outer cylindrical end of'which is seated-in a socket formed by arecess 27, in the upper edge of the lock casing '28, in conjunction with the plate 2 which surroundsthe recess on two sides. 7 The buffer, confined injthe slot 29 in the bolt body,pivots about this point.

- The inner side ofthe buffer is provided with a concaved recess '31 into which projects a flange :32 on the bolt body, 'VVhenthe outer face of the bufieris engaged by the strike 241,

thebuffer will be torcedinwardl ivotino, )7 a as described, and the edge of the recess 31-, engaging the outer face of the flange 32 will exert a camming action thereon resulting in a retraction of the bolt body into the casing."

It will be noted that a recess -34: similar and opposite to the recess27 is provided in the casing cover plate 35 which makes the latchbolt-with its bufl'er mechanism reversible in the casing; The formfand mounting of butfer described above combine to produce a lo'ng-thnaw bolt action which is highly-dc sirahle.

' The bolt-operating mechanismis illustrated inoFig; 10. The cylinder lock'5 has the usual dog or lever 36 which when turned in one direction by means-of a key isadapted to engage the inner end of the dead-bolt 3 and to move the entire bolt body forwardly in the casing to the position shown in broken lines. The dead-bolt 3 is normally locked in the re- 38 upon the bolt body. This member 37 has a longitudinal slot 39 with transverse portions 41 and 42 at the opposite endswhich are tracted and entended positions by means of i .a locking member 37 pivotally mounted at adapted toreceive a lug 43 which projects upwardly from the lock casing through a longitudinal slot 44 in the body of the deadbolt. A spring 45 on the member 37, which abuts a lug 46 on the dead-bolt body, tendsto retain the member 37 in the'position-shown in .Fi l0, and when in this position with the lug locked temporarily against movement in 43 occupying either ofthe recesses 41' or 42, it i will be apparentthat the dead-bolt will be citherdirection. The member 37has a part 4-7 projecting between upturned lugs v4L8 and 4:9 against the inner faces of which the dog or lever 36 operates 'injadvancing andretracting the bolt; "The dog or lever 36, however, I

in being turnedftoactuate theb'olt ineither direction. first engagesthe protecting part 47 of the locking member 37, with the result that thislocking member is oscillated in a counter:

clockwise direction, Fig; 10, around the pivot .38 to such anezctent that the'lug 43 is freed from the recess 41hr 42, as the case ma be,

, ther'eby 1 permitting I further: movement :of e

the actuating dog or lever 36 longitudinat movement of the dead-bolt in either the xad vanced or retracted direction:- Whenf the dead bolt'hast -reached either the! fully ea 'vancedor retracted position, the actuating lever 36moves away from the'bolt to permit 7 the locking member 37 to moveintojthe' look:- ing position. r e

It'willbe noted that theidead-bolt 3 has a lug 5'1pr'ojecting therefrom which,':when

ii ea the bolt is advanced, as'indicatedfin broken lines, takes a position in back ofthe'shoulder 52 of the latch-bolt 4L. -VVithit-he dead-bolt locked in theadvanced'position as d'escribed 7 above, it will be apparent that by reason or" this lug 151,ethelatchd oltawill also" be locked;

in the 'advajnced positon and cannot be drawn or forced in until thefdead-bolt 3' has again 'beenretracted; 1 1 1 As stated above, the latch-bolt ft 'isof the long-throw type and the actuating mechanism described above also is designed to an extentifar exceeding fthatobtainable by theusualfboltactuating mechanism- A single turnoi thekey not only aii'ords'a long projection of the dead-bolt, but resultsin a rigid locking in positioniboth of thedead-bolt The actuating lever 36 otthe cylinderbolt mechanismwalso is efiective for retracting the latch-bolts after retraction of the deadbolt.

This is accomplishedthrough a. common levermechanismunderlying the-deadbolt 3', one end 53 ofwhich engages the rear end 54' afford along-throw ofthe dead-bolt'3. It nvvill be apparent that by a singletum'of the I key, thebolt 3 is projected from the casing to isa I ofthe latch bolt, while the other end of the lever mechanism is engaged, as indicated in broken lines,bythe lever 36. i Particularattention is directed to the form of the bolt 3. This bolt as set forth above 1 comprises the two side members 7 and 8, the

outer end orbridge member 9, and the hook elements 11' and 12 pivotally mounted be- 1 tween the side members? and 8 and adapted swlngingdoor lock, materlal advantages refor transverse projection. In this type of suit from the transverse projection of the hooks as compared for example to projection fromthenarrow sides or ends of the bolt. As

described above, these locks comprise the dead-bolt and latch-bolt arranged end to end and in proximity. 'By'means of the transverse hook arrangement this proximity of bolt and latch maybe preserved ,so that full advantage of thejimmy-proof feature is I obtainable in a look as compact in form as the same general type of look without this feature. Transverse projection of the hooks is alsodesirable by..rea-son of bringing V the is not affected by 1 the door or frame.

hooks behind the relativelystrong sides of 1 f the strike instead'of the relatively weakbar portion 21 separating the openings 22 and 28, as would be the case were the hooks projectedvertically from the narrow, sides of the bolt.

"The bridge construction isalso of advantage in that it protects'the hooks and by reinforcing and strengthening the bolt as a whole v makes practicable the long throw which increases the jimmy-proof characteristics and is further desirable by reason of the fact that with allong bolt'the efficiency of the lock warping or shrinkage of I claim 1; In a look, a casing, a latch-bolt, a spring normally resiliently holding said latch-bolt ,invthe projected position, a buffer element operatively associated with said bolt, a recess "in the casing, a projection on said bufi'er e1ement pivotally seated in said recess and con- 7 stituting a fulcrum about which the said buffer is adaptedto pivot, a recess in the inner side of said bufferelement, and a flange on said bolt projecting into said recess whereqbythe overlying portion of the bufier is 2. In a lock, a, casing comprising an apertured end plate, said casinghaving in one .edge a recess embraced on two sides by said end plate, a latch-bolt slidably mounted in the'oasing and normally projecting through the said end plate, a spring normally retaining the bolt in the projected position, a latchbolt bufii'er element having a part pivotally seated and confined in said recess and having a portion normally projecting through said end plate, a latch-bolt slidably mounted in the casing and normally projecting through i the said end plate, a spring normally retaining the bolt in the projected position, a latchbolt buffer element. having a part pivotally seated and confined in said recess and having a portion normallyprojecting through said end plate to the exterior of the casing, said buifer having at its inner side a concaved recess, a flange on said bolt projecting into said lying portion of the buffer element whereby when said buffer is pivoted inwardly of the casing by engagement with an external relatively fixed element, the said latch is forced into the casing, andmeans permitting an angular adjustment of 180. in the position of the latch-bolt and-buffer element in the casrecess and adapted to be engaged by the over- 4:. In alock, a casing, a bolt, mechanism for' projecting the bolt from the casing and for retracting the bolt, said bolt comprising spaced longitudinal bars, a pin extending between the bars at the base thereof, hooked elements pivotally mounted on said pin and normally occupying a position between the planes defined by the opposite longitudinal V edges of said bars, means operative when the bolt is projected for causing said hooked elements to project beyond said planes, and a bar joining the outer ends of said longitudinal bars and protecting the outer ends of the hooked elements. 1

' i WILHELM WOLFF.

adapted to engage theouter surface of the flange to force the bolt inwardly when the I bufferis forcibly pivoted inwardly about said 

